無料オンライン SSL Certificate Checker - ToolBox

無料オンラインSSL/HTTPS checker that tests HTTPS reachability, HTTP/HTTPS status codes, final redirect URLs and response times by simply entering a domain or URL. Since this tool is a pure static site, browsers cannot directly read certificate details, so this tool uses public proxies to obtain basic reachability information, suitable for quickly determining if a site supports HTTPS and whether there are redirect anomalies。